Spill globals early if their next use is in call. They'll be spilled
anyway in this case.
Signed-off-by: Kirill Batuzov <batuz...@ispras.ru>
---
tcg/tcg.c | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 8ab556d..ad5bd71 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1297,6 +1297,11 @@ static void tcg_liveness_analysis(TCGContext *s)
if (!(call_flags & TCG_CALL_CONST)) {
/* globals are live (they may be used by the call) */
memset(dead_temps, 0, s->nb_globals);
+#ifdef USE_ADVANCED_REGALLOC
+ for (i = 0; i < s->nb_globals; i++) {
+ temp_next_use[i] = op_index;
+ }
+#endif
}
/* input args are live */
@@ -1393,6 +1398,11 @@ static void tcg_liveness_analysis(TCGContext *s)
} else if (def->flags & TCG_OPF_CALL_CLOBBER) {
/* globals are live */
memset(dead_temps, 0, s->nb_globals);
+#ifdef USE_ADVANCED_REGALLOC
+ for (i = 0; i < s->nb_globals; i++) {
+ temp_next_use[i] = op_index;
+ }
+#endif
}
/* input args are live */
@@ -2190,6 +2200,14 @@ static inline int tcg_gen_code_common(TCGContext *s,
uint8_t *gen_code_buf,
#endif
dead_iargs = s->op_dead_iargs[op_index];
tcg_reg_alloc_mov(s, def, args, param_next_use_ptr, dead_iargs);
+#ifdef USE_ADVANCED_REGALLOC
+ if (args[0] < s->nb_globals) {
+ if (tcg_op_defs[gen_opc_buf[param_next_use_ptr[0]]].flags
+ & TCG_OPF_CALL_CLOBBER) {
+ tcg_reg_free(s, s->temps[args[0]].reg);
+ }
+ }
+#endif
break;
case INDEX_op_movi_i32:
#if TCG_TARGET_REG_BITS == 64
--
1.7.4.1
